Even the winter months in Egypt can reach temperatures of up to 80 degrees, so visiting Luxor at the right time is paramount, especially if traveling with children or older adults.  The coolest months range from November to April, but even then it’s advised to drink plenty of water and to take frequent rests (especially during the hot lunch hours).  However, even though the days get very warm, the nights can be rather cool, dropping as low as the 50s.  Make sure you pack for both temperature extremes!

As for special events, Luxor boasts several festivals that coincide both to traditional ancient Egyptian practices, as well as religious holidays of various sects (including Egypt-wide festivals like Mohammed’s birthday).

Moulid of Abu el-Haggag is an annual festival that takes place two weeks before Ramadan and features music, dance, a boat parade, stick fighting, and horse races.  Twice a year, the Karnak temple holds a Pharaonic Wedding Festival that actually marries 40 couples in the ancient style, full of ritual, costume, music, dance and ceremony. 

Even if you go on during a time away from official celebration, most of Luxor’s monuments (especially the Karnak/Luxor temple complex) feature daily performances and reenactments of the rights and ceremonies that took place there millennia ago.  

For more information about when to go, please refer to the following links:

http://www.wunderground.com/global/st...
http://www.weather.com/weather/tenday...
http://www.climatetemp.info/egypt/lux...
http://weather.yahoo.com/forecast/EGX...